A journey of a thousand miles must begin with a single step.
Goepfert
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D006801:Humans; D008175:Lung Neoplasms / Q000517:prevention & control*; D010819:Physician's Role; D012878:Skin Neoplasms / Q000517:prevention & control*; D000074606:Smoking Prevention; D013471:Sunburn / Q000517:prevention & control*